United Republic of Tanzania

Name: United Republic of Tanzania Births & Fertility Statistics
Creator: Measured World
Published: 2024-07-01
License: https://creativecommons.org/licenses/by/3.0/igo/

1950

2025

2100

United Republic of Tanzania

1950

2025

2100

What to know

Fertility rate is 4.47 children per woman—above the replacement level of 2.1.

Fertility has fallen by 0.33 children per woman over the past 5 years.

Projected fertility rate in 2100: 2.26 children per woman.

Key statistics for 2025

Fertility rate

4.47 children/woman

Birth rate

34.3 per 1,000 people

Total births

2.4M

Mean age at birth

28.9 years

Key terms

Total fertility rate (TFR): — Average number of children a woman would have over her lifetime at current rates.
Crude birth rate (CBR): — Births per 1,000 people per year.
Net reproduction rate (NRR): — Average number of daughters per woman surviving to reproductive age.
Replacement level: — TFR of approximately 2.1 needed to maintain a stable population without migration.

Fertility rate

How high is the fertility rate?

Average number of children per woman over her lifetime

4.47 children per woman

Above replacement level (2.1)

At 4.47 children per woman, this is among the higher fertility rates globally. The population is growing through natural increase.

Birth trends

How significant are teen births?

Total births and teen pregnancy trends

Approximately 2.4 million babies are born each year. Teen births (ages 15-19) account for 17.5% of all births.

Fertility indicators

Are generations replacing themselves?

TFR, net reproduction rate, and crude birth rate

The net reproduction rate of 2.06 means each generation of women is more than replacing itself.

Childbearing patterns

Mean Age at Childbearing

Average age of mothers at childbirth

Sex Ratio at Birth

Boys per 100 girls at birth

Mean age at childbearing is 28.9 years. The sex ratio at birth is 103 males per 100 females, within the natural range.

The bottom line

United Republic of Tanzania's fertility rate has fallen dramatically from 7.1 children per woman in 1974 to 4.47 today—still well above the 2.1 replacement level. Projections show continued decline to 2.26 by 2100. Teen pregnancy remains notable, with 17% of births to mothers aged 15-19.

Source: UN World Population Prospects 2024. Historical estimates (1950–2024) and medium-variant projections (2025–2100).

What to know

Fertility rate is 4.47 children per woman—above the replacement level of 2.1.

Fertility has fallen by 0.33 children per woman over the past 5 years.

Projected fertility rate in 2100: 2.26 children per woman.

Key statistics for 2025

Fertility rate

4.47 children/woman

Birth rate

34.3 per 1,000 people

Total births

2.4M

Mean age at birth

28.9 years

Key terms

Total fertility rate (TFR): — Average number of children a woman would have over her lifetime at current rates.
Crude birth rate (CBR): — Births per 1,000 people per year.
Net reproduction rate (NRR): — Average number of daughters per woman surviving to reproductive age.
Replacement level: — TFR of approximately 2.1 needed to maintain a stable population without migration.

Fertility rate

How high is the fertility rate?

Average number of children per woman over her lifetime

4.47 children per woman

Above replacement level (2.1)

At 4.47 children per woman, this is among the higher fertility rates globally. The population is growing through natural increase.

Birth trends

How significant are teen births?

Total births and teen pregnancy trends

Approximately 2.4 million babies are born each year. Teen births (ages 15-19) account for 17.5% of all births.

Fertility indicators

Are generations replacing themselves?

TFR, net reproduction rate, and crude birth rate

The net reproduction rate of 2.06 means each generation of women is more than replacing itself.

Childbearing patterns

Mean Age at Childbearing

Average age of mothers at childbirth

Sex Ratio at Birth

Boys per 100 girls at birth

Mean age at childbearing is 28.9 years. The sex ratio at birth is 103 males per 100 females, within the natural range.

The bottom line

Source: UN World Population Prospects 2024. Historical estimates (1950–2024) and medium-variant projections (2025–2100).

United Republic of Tanzania - Births & Fertility Statistics | Measured World